Table 3.

Views on the clinical usefulness of iTero and Trios after training (4-point Likert scale)

Variables	iTero group			Trios group
	iTero	Trios	p-value	iTero	Trios	p-value
	Mean (SD)			Mean (SD)
Light weight head	1.65 (0.78)	2.65 (0.86)	.000*	1.89 (0.60)	2.30 (0.58)	.014*
Small-sized head	2.12 (0.69)	2.42 (0.87)	.096	2.00 (0.70)	2.18 (0.63)	.332
Easy to operate software	2.89 (0.85)	2.95 (0.82)	.750	2.24 (0.75)	3.00 (0.50)	.008*
Easy to operate hardware	2.47 (0.71)	2.82 (0.63)	.188	2.29 (0.46)	2.70 (0.46)	.004*
Good grip	2.05 (0.65)	2.76 (0.66)	.009*	2.35 (0.78)	2.23 (0.66)	.651
Quick training	2.23 (0.56)	2.70 (0.77)	.056	2.41 (0.50)	2.58 (0.50)	.269
Comfortable handling	2.52 (0.87)	3.17 (0.52)	.007*	2.58 (0.71)	2.70 (0.77)	.579

4-point Likert scale: 1 = strongly disagree, 2 = disagree, 3 = agree, 4 = strongly agree, *: p < 0.05